Cupric ion in combination with hydrogen peroxide and hydroxylamine applied to inactivation of different microorganisms
| Autor: | Jiyoon Cho, Min-Sik Kim, Chang Ha Lee, Dongwon Cha, Hye-Jin Lee, Taewan Kim, Erwin Jongwoo Park |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Microorganism 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Hydroxylamine 010501 environmental sciences Protein oxidation Hydroxylamines 01 natural sciences Redox Oxygen chemistry.chemical_compound Environmental Chemistry Hydrogen peroxide Waste Management and Disposal 0105 earth and related environmental sciences 021110 strategic defence & security studies biology Hydrogen Peroxide biology.organism_classification Pollution chemistry Oxidation-Reduction Bacteria DNA Copper Nuclear chemistry |
| Zdroj: | Journal of hazardous materials. 400 |
| ISSN: | 1873-3336 |
| Popis: | The microbial inactivation by cupric ion (Cu(II)) in combination with hydrogen peroxide (H2O2) and hydroxylamine (HA) was investigated for twelve different microorganisms (five Gram-negative bacteria, three Gram-positive bacteria, and four bacteriophages). The inactivation efficacy, protein oxidation, and RNA (or DNA) damage were monitored during and after treatment by Cu(II), Cu(II)/HA, Cu(II)/H2O2 and Cu(II)/HA/H2O2. The rate of microbial inactivation by the (combined) microbicides generally increased in the order of Cu(II) < Cu(II)/H2O2 < Cu(II)/HA < Cu(II)/HA/H2O2; Cu(II)/HA/H2O2 resulted in 0.18-0.31, 0.10-0.18, and 0.55-3.83 log inactivation/min for Gram-negative bacteria, Gram-positive bacteria, and bacteriophages, respectively. The degrees of protein oxidation and RNA (or DNA) damage increased in the order of Cu(II) < Cu(II)/HA < Cu(II)/H2O2 < Cu(II)/HA/H2O2. In particular, Cu(II)/HA/H2O2 led to exceptionally fast inactivation of the viruses. Gram-positive bacteria tended to show higher resistance to microbicides than other microbial species. The microbicidal effects of the combined microbicides on the target microorganisms were explained by the roles of Cu(I) and Cu(III) generated by the redox reactions of Cu(II) with H2O2, HA, and oxygen. Major findings of this study indicate that Cu(II)-based combined microbicides are promising disinfectants for different waters contaminated by pathogenic microorganisms. |
| Databáze: | OpenAIRE |
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